github-vet / github-vet/rangeloop-pointer-findings

lianghucheng/ddz-match: game/session/session.go; 5 LoC

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Description

Found a possible issue in [lianghucheng/ddz-match](https://www.github.com/lianghucheng/ddz-match) at [game/session/session.go](https://github.com/lianghucheng/ddz-match/blob/caa8d8cfc930fbd1c9d202ed70ba6b6ebb1ae775/game/session/session.go#L709-L713)

Below is the message reported by the analyzer for this snippet of code. Beware that the analyzer only reports the first issue it finds, so please do not limit your consideration to the contents of the below message.

>

[Click here to see the code in its original context.](https://github.com/lianghucheng/ddz-match/blob/caa8d8cfc930fbd1c9d202ed70ba6b6ebb1ae775/game/session/session.go#L709-L713)

Click here to show the 5 line(s) of Go which triggered the analyzer.

```go
for _, v := range *backFlowdatas {
v.FlowIDs = append(v.FlowIDs, fid)
v.ChangeAmount += utils.Decimal(awardAmount)
db.SaveFlowdata(&v)
}

```

Click here to show extra information the analyzer produced.

```
No path was found through the callgraph that could lead to a function which writes a pointer argument.

No path was found through the callgraph that could lead to a function which passes a pointer to third-party code.

root signature {SaveFlowdata 1} was not found in the callgraph; reference was passed directly to third-party code
```

Leave a reaction on this issue to contribute to the project by classifying this instance as a **Bug** :-1:, **Mitigated** :+1:, or **Desirable Behavior** :rocket:
See the descriptions of the classifications [here](https://github.com/github-vet/rangeclosure-findings#how-can-i-help) for more information.

commit ID: caa8d8cfc930fbd1c9d202ed70ba6b6ebb1ae775

Contributor guide

No contributing guide indexed for this repository

Research direction

Open game/session/session.go at lines 709-713 and read the surrounding loop and SaveFlowdata call. Determine whether the range variable handling is a bug, mitigated, or desirable behavior, then leave the corresponding reaction described in the issue.

Written by the indexing model from the issue text.

Assessment

Tech stack
go
Domain
backend, game-dev
Issue type
Bug
Difficulty
2/5
Estimated time
1-3 hours
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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